• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Evaluation of B-mode and color Doppler ultrasound as alternative tools for the study of reproduction, temperament, and milk production- related variables in the bovine.
【24h】

Evaluation of B-mode and color Doppler ultrasound as alternative tools for the study of reproduction, temperament, and milk production- related variables in the bovine.

机译：评估B型和彩色多普勒超声作为研究牛繁殖，气质和奶产量相关变量的替代工具。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An adequate vascular perfusion status is essential not only to maintain life, but to ensure the proper physiology of the different systems that form the animal's body. Due to its role in the transport of oxygen and nutrients toward, and the removal of cellular waste products away from the body's tissues, the circulatory system is responsible for the maintenance of body homeostasis. Production related functions in farm animals are not an exception, and directly depend on sufficient vascular physiology. In the past, the study of blood flow in large domestic species was restricted to highly invasive techniques. However, even when such techniques are the foundation for the actual understanding of vascular dynamics in these animals, their limited feasibility and potential impact over the normal vascular physiology represent significant limitations to these approaches. Recently, the development and application of non-invasive technologies (i.e., Doppler and B- mode ultrasound) to the area of animal sciences has provided the potential for the study of vascular dynamics while, the negative implications aforementioned are avoided. In our studies, these technologies were applied to assess the role of the circulatory system on different production related variables such as: temperament, reproduction, and milk production in the bovine. A tendency toward differences in jugular blood flow was associated with the temperament in beef calves in this study. Also, a significant increase in vasodilation in the uterine arteries of beef cows was found to be associated with a numerically higher reproductive efficiency (i.e., pregnancy rates). Moreover, an increase in blood flow towards the mammary gland in dairy cows was associated with administration of bovine somatotropin. In conclusion, B- mode and Doppler ultrasound resulted in tools able to reflect the essential role of an adequate vascular perfusion in the normal physiology and productive performance in the bovine. However, in real farm scenarios the feasibility of these techniques in large domestic species is limited. Therefore, further specialization of this instrument to the conditions existent in such farm scenarios are recommended to improve its feasibility and to significantly accelerate the rate of knowledge acquisition in this area.
机译：适当的血管灌注状态不仅对维持生命至关重要，而且对于确保构成动物身体的不同系统的正常生理也至关重要。由于其在向体内输送氧气和营养素以及从身体组织中清除细胞废物的作用，循环系统负责维持人体的体内平衡。农场动物中与生产相关的功能也不例外，它直接取决于足够的血管生理。过去，对大型家庭物种的血流研究仅限于高侵入性技术。但是，即使这些技术是实际了解这些动物血管动力学的基础，其有限的可行性和对正常血管生理的潜在影响也代表了这些方法的重大局限性。近来，非侵入性技术（即多普勒和B型超声）在动物科学领域的开发和应用为研究血管动力学提供了潜力，同时避免了上述负面影响。在我们的研究中，这些技术被用于评估循环系统在不同的生产相关变量（例如：牛的气质，繁殖和产奶量）中的作用。在这项研究中，颈静脉血流差异的趋势与牛肉犊的气质有关。另外，还发现肉牛子宫动脉血管舒张的显着增加与较高的生殖效率（即怀孕率）有关。此外，奶牛流向乳腺的血流量增加与牛生长激素的施用有关。总之，B型和多普勒超声检查产生的工具能够反映出适当的血管灌注对牛的正常生理和生产性能的重要作用。但是，在实际农场中，这些技术在大型家庭物种中的可行性受到限制。因此，建议针对这种农场情景中存在的条件对该工具进行进一步的专业化，以提高其可行性并显着加快该领域知识的获取速度。

著录项

  • 作者

    Sanchez-Rodriguez, Hector Luis.;

  • 作者单位

    Mississippi State University.;

  • 授予单位 Mississippi State University.;
  • 学科 Agriculture Animal Culture and Nutrition.;Biology Physiology.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 155 p.
  • 总页数 155
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号